Enter a codons base pairings to see what amino acid it codes for. There are 64 codon combinations to code for 20 amino acids. RNA Codons is a useful app for biology students and professionals alike. RNA Codons helps you find the correct amino acid for a codon or anticodon in RNA for protein synthesis. Easily crack genetic code with RNA Codons. RNA Codons also includes a tool to convert between different genetic material.